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The Eastern Time Zone (ET) is a time zone encompassing part or all of 23 states in the eastern part of the United States, parts of eastern Canada, and the state of Quintana Roo in Mexico. Eastern Standard Time ( EST ) is five hours behind Coordinated Universal Time ( UTC−05:00 ).
Greenwich Mean Time (GMT) :: UTC : Archived 2013-05-08 at the Wayback Machine MHonArc Resources: TIMEZONES AIX time zone table Archived 2018-07-11 at the Wayback Machine
Greenwich Mean Time (GMT) is the local mean time at the Royal Observatory in Greenwich, London, counted from midnight. At different times in the past, it has been calculated in different ways, including being calculated from noon ; [ 1 ] as a consequence, it cannot be used to specify a particular time unless a context is given.
Local programming such as locally produced newscasts are not typically affected as many stations air their morning newscast at 4:00, 4:30, 5:00 or 5:30 a.m., and their early evening newscasts at 5:00 and/or 6:00 p.m.; however, the late evening newscast is affected due to the differences in time between time zones, meaning that if the late local ...
[2] [3] This was changed later in 1880, when Greenwich Mean Time was legally adopted throughout the island of Great Britain under the Statutes (Definition of Time) Act 1880 (43 & 44 Vict. c. 9). GMT was adopted on the Isle of Man on 30 March 1883, [4] Jersey in 1898, and Guernsey in 1913. Ireland adopted GMT in 1916, supplanting Dublin Mean ...
Standard Time (SDT) and Daylight Saving Time (DST) offsets from UTC in hours and minutes. For zones in which Daylight Saving is not observed, the DST offset shown in this table is a simple duplication of the SDT offset.
[1] [2] [3] In 1915, Detroit changed to Eastern time to be on the same time zone as New York, [4] followed by most of the rest of the state in 1931. [ 5 ] In 1967, when the Uniform Time Act came into effect, the Upper Peninsula went under year-round CST, with no daylight saving time . [ 6 ]
All six of the New England states in the northeastern U.S., currently in the Eastern Time Zone (with daylight saving time), have considered legislation to shift to UTC−04:00, equivalent to Atlantic Standard Time (with no observance of daylight saving time) or Eastern Daylight Time.